Son of Gary; son of the spear-carrier
A modern English patronymic surname-name meaning 'son of Gary'. The root name Gary is derived from the Germanic element 'ger', meaning spear, making this name part of the long tradition of warrior-themed English names.
Less common today
Garyson isn't in the latest US Top 1000. It last peaked at #6,536 in 2011.
US births per 5-year period, 1990βpresent (SSA data).